/**
       * excel导出
       * @param req
       * @param resp
       * void
       * @throws IOException 
      */
     private void exportAccountData(HttpServletRequest req,
             HttpServletResponse resp) throws IOException {
         
         String sql=" select id,aname,type,money,remark,create_time as createTime,update_Time as updateTime from account "
                 + "  where user_id=?";
         
         User user=(User) req.getSession().getAttribute("user");
         
         List<Account> list=MyBaseDao.queryRows(sql, new Object[]{user.getId()}, Account.class);
         
         if(null!=list&&list.size()>0){
             
             String fileName="账户数据.xls";
             resp.setHeader("Content-disposition","attachment;filename="
                 +new String(fileName.getBytes("gb2312"),"ISO8859-1"));    //设置文件头编码格式        
            resp.setContentType("APPLICATION/OCTET-STREAM;charset=UTF-8");//设置类型
            resp.setHeader("Cache-Control","no-cache");//设置头
            resp.setDateHeader("Expires", 0);//设置日期头
            
            HSSFWorkbook book=new HSSFWorkbook();
            
            HSSFSheet sheet=book.createSheet();
            CellStyle cellStyle=book.createCellStyle();
            
            cellStyle.setDataFormat(book.createDataFormat().getFormat("yyyy-MM-dd"));
            
            for(int i=0;i<list.size();i++){
                Account account=list.get(i);
                Row row=sheet.createRow(i);
                
                Cell cell1=row.createCell(0);
                cell1.setCellValue(account.getId());
                
                Cell cell2=row.createCell(1);
                cell2.setCellValue(account.getAname());
                 Cell cell3=row.createCell(2);
                 cell3.setCellValue(account.getMoney());
                 Cell cell4=row.createCell(3);
                 cell4.setCellValue(account.getType());
                 Cell cell5=row.createCell(4);
                 cell5.setCellValue(account.getRemark());
                 
                 Cell cell6=row.createCell(5);
                 cell6.setCellValue(account.getCreateTime());
                 cell6.setCellStyle(cellStyle);
                 
                 Cell cell7=row.createCell(6);
                 cell7.setCellStyle(cellStyle);
                 cell7.setCellValue(account.getUpdateTime());
             }        
             
             book.write(resp.getOutputStream());
             
             resp.getOutputStream().flush();
             resp.getOutputStream().close();
         }
     }